Rotary fan or paddle wheel.



N0. 637,|05. Patentd Nov. 14, I399. W. J.- FITCH.

ROTARY FAN 0B PA-DDLE WHEEL.

(Application filed. Apr. 11, 1899.)

3 Sheets-Sheet I,

(No Model.)

Vail- EEEES.

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N0. 637,l05. Patented Nov. l4, I399. W. J. FITCH.

ROTARY FAN 0R PADDLE WHEEL.

(Application filed Agr. 11, 1899.)

3 Shuts-Sheet 2.

(No Model.)

WI} E5555.

No. 637,l05. Patented Nov. l4, I899. I W. J. FITCH.

ROTARY FAN 0B PADDLE WHEEL.

(Application filed Apr. 11, 1899.) I (No Medal.) 3 Sheets-Sheet 3 preferably forked, as shown in Figs. 2 and 4-,

UNITED STAT S PATENT OFFICE.

IVATSON J. FITCH, OF BOSTON, MASSACHUSETTS.

ROTARY FA-N o R PADDLE WHEEL.

SPECIFICATION formingpart of Letters Patent No. 637,105, dated November 14, 1899.

\ Application filed April 11, 1899.

To all whom it may concern.- v

Be it known .that I, WATSON J. FITCH, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Rotary Fan or PaddleWheels, of which the followingis a specification.

This invention relates to rotary fan or paddle wheels or blowers, and has for its chief object to provide a new and improved fan or paddle wheel wherein a plurality of fans or paddles are intermittingly rotated to obtain the least and the greatest resistance where desired. This object is accomplished in the manner and by the means hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure l represent-s a side elevation of the improved rotary fan or air-blower. Fig. 2 represents a top plan view of the same. Fig. 3 represents a detail side elevation of the rotary fan-wheel. Fig. 4 represents a bottom plan view of Fig. 3. Fig. 5 represents an enlarged detail side View of one of the pairs of gears for intermittingly rotating the fans or paddles. Fig. 6 represents a top plan view of the fan-shaft bearing and stationary sprocketwheel. Fig. 7 represents a side elevation of a modification of the rotary fan-wheel, showing it as adapted for use as a paddle-wheel, water-wheel, or windmill. Fig. 8- represents a top plan view of Fig. 7. Fig. 9 represents a side elevation of a modified form of the gears for intermittingly rotating the fans or. paddles, and Fig. 10 is a similar View show ing another modification in the construction of said gears adapted for the wheel shown in Fig. 7.

Similar letters refer to similar parts wherever they occur on the ditferent parts of the drawings.

In Fig. 1, A represents the wheel-shaft journaled in a suitable bearing, and to such shaft is secured the wheel or wheel-frame B, which may be solid, as shown in Figs. 1 and 2, or skeleton form, as represented in Figs. 3 and 4E.

The outer portion of the wheel-frame is and in the forked ends of such wheel-frame are journaled axles O O, to which are secured sprocket-wheels D D, with which an endless chain E engages, said chain being carried Serial No. 712,590. (No model.)

of the sprocket-wheels D is secured a muti lated driving-gear G, engaging a corresponding mutilated driven gear H, secured to the fan or paddle shaft t, that is journaled in the outer forked portion of the wheel-frame and has secured to it a fan or paddle I, as shown. The rotation of the wheel-frame causes the endless chain to rotate the sprocket-wheels D and the gears G; but by reason of the mutilated construction of the gears G and H the latter are turned only at intervals. It will thus be seen that when a rotary motion is imparted to the wheel-frame intermittent rotary motion is imparted to the wings or fans I by the stationary sprocket-wheel F, endless chain E, sprocket-Wheels D, and the gearwheels Gr and H, thereby causing the fans or paddles I to vary their positions during the rotation of the wheel-frame, so as to-pass with least resistance when so desired and so as to obtain the greatest resistance when so desired.

The wheel and its intermittently-rotating fans or paddles are made to rotate in a segmental flue K, causing the air to be drawn in at k and ejected at during the rotation of the device. The wings or fans I as they enter the flue K are held in a horizontal position, and when they leave such flue they are held in a vertical position, as shown in Fig. 1.

In Figs. 7 and 8 the device is shown adapted for use as a windmill or paddle or water wheel, and for this purpose I prefer to make the wheel-frame duplex, with end bearings for the fans, instead of a central frame having a middle bearing for the fans or paddles, as shown in Fig. 2.

The mutilated gears for intermittingly rotating the fans or paddles as the wheel-frame turns may be of the formshown in Fig. 5 or constructed as shownin Figs. 9 and 10. In

Fig. 5the gear G is provided with two sec' diametrically opposite pins G to cooperate with four radial slots H in the gear H In Fig. 10 the gear G is provided with a single section of teeth cooperating with two separated sections of teeth on the gear H as will be obvious.

\Vhat I wish to secure by Letters Patent and claim is 1. The combination of a rotatable Wheelframe, a series of sprocket-wheels and fans or paddles mounted in the outer portion of the wheel-frame, an endless chain engaging the sprocket-Wheels, means for causing the chain to travel as the wheel-frame rotates, and devices actuated by the sprocket-Wheel axles and operating, substantially as described, to intermittingly rotate the fans or paddles.

2. The combination of a wheel-frame, a series of sprocket-wheels in the outer portion of the wheel-frame, an endless chain engaging the sprocket-wheels, means for causing the chain to travel as the Wheel-frame turns, to rotate the sprocket-wheels, a series of fans or paddles, and mutilated gears operated by the sprocket-Wheel axles to intermittingly rotate the fans or paddles,substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WATSON J. FITCH.

\Vitnesses:

ALBAN ANDREN, LAfJRrrz N. MoLLER. 

